Power molding-machine



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P. s. HAWKINS.

POWER MOLDING MAOH'INE.

No. 270,898, Patented Jan.23, 1883.

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F. S. HAWKINS.

POWER MOLDING MACHINE.

No. 270,898. Patented Jan.23,1883.

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' UNITED STATES PATENT OFFICE.

FRANK S. HAWKINS, or WORCESTER, MASSACHUSETTS.

POWER MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 270,898, dated January23,1883.

Application filed June 16, 1882. (No model.)

To all whom it may concern:

Be it known that I, FRANK S. HAWKINS, of the city and county ofWorcester, and Commonwealth of Massachusetts, have invented certain newand useful lmp'rovementsin Power Molding-Machines; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being bad to the accompanying drawings, formingapart of this specification, and in whichi Figure 1 represents a top orplan view of.

my aforesaid improved power molding machine. Fig. 2 represents a sideview of the machine shown in Fig. 1, lookingin the direction indicatedby arrow at, same figure. Fig. 3 represents a vertical section throughthe machine, taken on line A A,Fig.1, looking'in the direction of arrowa, same figure. Fig. 4 represents a vertical section through a part ofthe machine, taken on line B A, Fig. 1,1ooking in the direction of arrowat, same figure. Fig. 5 represents a vertical section on line D D, Fig.4, looking in the direction of arrow 0, same figure. Fig. 6 represents atop or plan view ofa part-of the. machine, which will be hereinaftermore fully described, and Fig. 7

represents a front end view of the parts shown in Fig. 6, looking in thedirection of arrows 01, Figs. 1, 2, and 6. Figs. 8, 9, and 10 are detailviews of certainparts.

My invention relates to a machine for that class of molding in sandcalled snap-flask molding.

It consists in constructing and arranging the several parts of themachine so that by operating a hand-lever pressure may be applied to orwithdrawn from the sand at will by steamor other power properlyconnected with said machine.

It also consists in the combination of a sprue-hole cutting or punchingdevice with the aforesaid pressure mechanism, whereby the sprue-hole isautomatically punched in the sand at the proper time, as will-behereinafter more fully explained.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will proceed to describe it more in detail.

In the drawings, E E represent two side frames for supporting theseveral parts of the machine.

may be connected by means of a belt with any suitable driving mechanism.Said pulley is fitted to turn upon horizontal shaft G, which in turn isfitted to turn in suitable bearings notched hub F of driving-pulley F bymeans of a hand-lever, K, which is hinged to a bearin g, g, formed uponor secured to across-frame piece, L, fastened at each end to the sideframes, E E. The outer end of leverKis provided with anoperating-handle, K, and its inner upper end is hinged to a link-piece,K which link-piece is in turn hinged to the end of an angular forkedshipping-lever, K hinged at h to a supporting part, It, extending upfrom cross-frame piece L. The other forked end of saidshipping-lever Kis arranged in the circular groove 1, formed on the clutch I. Thus bythis arrangement it will be seen that by depressing the handle K oflever K the clutch. is engaged with the notched hub F of thedriving-pulley, and held there by the tilting piece'm until released bythe pin it, as hereinafter described. r

The clutch is held in position against the notched hub F while themachine is in operation by means of tilting part m, pivoted near thecenter upon a pin, in, pointed at one end, m, and made heavier at theother end, m Said part at is supported on bearings m m, formed onframe-piece m which frame-piece forms a branch of cross-frame piece L,and is extended up to form the support and bearing H for shaftG. In thisinstance said frame-piece m is fastened to a part, 70, extended up frompart L; but,if preferred, they may be formed in one piece. hub F of thedriving-pulley the locking-pin m occupies a horizontal position, asrepre- (see Figs. 3 and 4,) formed in said frame-piece.

F representsthe main driving-pulley, which' When the clutch Iis inaction with the when the compressing-plate Q is in its highest position.-When the clutch is nnshipped the operating-lever K is forced up, so asto swing the upper end back, by means of a spiral spring, K. At the sametime that the drivingpower is unshipped the disk J is stopped and heldby a brake, K formed upon the end of a lever, K", which projectslaterally from lever K, beingheld by and arranged to turn in a suitablebearing, K, at its outer end.

The parts marked M represent a metal grating, upon which is first placeda matchboard and then the pattern. The lower haltflask or "noweP is nextplaced in position upon the match-board and filled with sand. A bottomboard, N, (having cleats M fastened to it,) the size of the inside ofthe nowel, is then placed over all, with the cleats on top, and themachine started by depressing the hand-lever K, which operation bringsthe compressing-plate Q down upon the cleats M of the bottom board N,and compresses the sand. The machine, now continuing to operate, isantomatically stopped at the end of one revolution of disk J, aselsewhere described, leaving the compressing-platein its elevatedposition. The nowel is now removed by hand, and the match-board thenremoved, which leaves the pattern 0 at the top embedded in the sand, asshown in Fig. 3 of the drawings.

Up to this point in the molding operation (except the manner ofcompressing the sand, as hereinafter described) the method is the sameor similar to that usually employed, and I therefore make no claimthereto, except in combination with my improvements. Neither do I makeany claim, in a broad sense, to a power molding-machine, as I am awarethat there are several already. patented, but of different constructionfrom. mine.

After the lower half-flask or nowel has been inverted, as beforedescribed, and the parting or dry sand sprinkled over the same toprevent adhesion, the upper half-flask or cope, P, is then arrangeddirectly over said nowel and filled with sand. The upper halfflask orcope having been filled with sand, as aforesaid, the compressing-plate Qis now again madeto descend and compress said sand in a proper manner.At the instant when the compressing-plate Q is at its lowest position asprue-hole cutting or punching device is brought into action by the sameoperation of the hand-lever K, which operation not only punches thesprue-hole, but also releases the spring 1 (see Fig.6) and allows theleversSS to engage in slots (1 g in the cope, thereby raising said copewith the compressing-plate. The pattern is now drawn out of the sand inthe nowel and the machine started, which operation lowers the cope andsand in the same together and leaves them in the position shown by fulllines in the drawings,the compressing plate rising into its elevatedposition after leaving the cope and sand, as aforesaid. The cope may nowbe nnfastened and swung back, when the molding operation is completed.

The compressing-plate Q and sprue-holepunching device are constructed,arranged, and operate in the following manner:

The compressing-plate Q is fastened upon its upper side to two arms orlevers, QiQ, which are hinged upon a horizontal shaft,'R, fastened ateach end to the side frames, E E. Said plate is raised and lowered bythe operation of disk J, (which turns in the direction shown by arrows0,) being connected with said disk by means of link-sections It, R R andR R one end of the section B being hinged to the disk near itsperiphery, its other end hinged to the lower ends of sections R R andupper ends of sections R R the sections R hinged at their upper ends toa strong crosspiece, It, fastened at each end to the side frames, E E,and the lower ends of the sections R hinged to the plate-holding arms QQ. By this construction it will be seen that the greatest pressure,which is a very strong one, is produced, when it is most needed, afterthe plate has been nearly lowered and commences to press upon the sand.

During the operation of compressing the sand in the lower half-flask ornowel, the upper half-flask or cope is swung around (as before stated,and shown by dotted lines in Fig. 1) out of the way, being hinged at theback corners, 0 o, and fastened at the center in front by a latchdevice, p, to admit of this adjustment. The cope is provided withflanges P P, which extend back to form bearings for it to swing upon theshaft It. After the sand in the cope has been compressed, said cope andthe compressing-plate Q are locked together, so that the cope containingthe compressed sand may be raised to remove the pattern 0 by springingthe outerends, q q, of the levers S S into the slots q q, formed in theears or flanges g g at each side of the cope. (See Figs. 1, 2, 6, and 7of the drawings.)

In Fig. 1 the locking latches or levers S S are represented as beinglocked into the slots g g by full lines, and by dotted lines as beingdisengaged or drawn out of the same. Said locking and unlockingoperation is performed in the following manner: The inner end of thelever S is notched onto the end of the other lever, S, as is shown inFigs. 1 and 6, so that when said lever S is drawn forward from its innerend both levers will be operated alike. If preferred, any other similarmethod may be employed. The outer ends of the locking-levers are keptsprung out, as shown by full lines, except when forced back,

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by means of springs r 1', fastened to the outersides of the holding-armsQ Q. They are forced back, so as to unlock the plate from the cope, bymeans of a lever, S which is hinged at am the inner end of the lever S.Said lever S is guided and held in position laterally by means of'guidest t, fastened to the upper side of the compressing-plate Q, and is drawnforward at the proper time by means of ahook, u, catching in the notchedend S of said lever S Hook u is hinged to the lower end of avertically-arranged swinging lever, T, which is fulcrumed to a bearing,T, on cross-frame L, and said lever T, which in this instance is angularin shape, (see Fig. 5,) is provided at its upper end with a pointed heador cam part, T which, as the disk J revolves, is struck by a cam-pin,v,which forces the upper end of the lever back into the position shownin Figs. 3

and 4 of the drawings, and thereby causeslhe locking-levers S S tobedrawn outof the slots (1 g into the positions shown by dotted lines inFig. 1, thus releasing the cope from thecompressing-plate Q. Thelocking-levers S S, when drawn out of the slots g f, as beforedescribed, are held in that position by spring 1 engaging in anotch inthe under side of the pulling bar or lever S The sprue-hole-punchingdevice consists of a swinging lever, U, which is hinged at'one end uponthe horizontal shaft R, and is provided at the other end with a hollowsprue cutter or puncher, V, which is adjusted to strike through thesprue-hole 10 in the compressing-plate. In this instance saidspruecutter is provided with a funnel-shaped opening, 20, and projectingpart 20, which strikes in the opening tu of the compressing-plate, .whenit is swung down. The swinging lever U is kept in an elevated position,when not in use, by means of a spiral spring, .70, arranged over theshaft B, one end being fastened to said shaft, while the-other end isfastened to the lever. Any other similar device suitable for the purposemay be employed. Said lever U is operated to cut the sprne-hole by meansof a hook, I hinged to lever T, by said hook engaging in a catch ornotchformed in the hinged pull bar or lever W, one end of the bar or lever -Wbeing hinged to the sprue-lever U and the other end loosely supportedand guided in a loop,'y, fastened .to the lower end of lever T. Lever W,being hinged to the sprueholding lever U, close to the bearing of thesame, causes said lever to be swung over to punch the sprue-hole by aquick movement.

The pull-bar S is unlocked, so as to allow the levers S S to be sprungforward into the slots (1 g by springs 1'1", by the sprue-lever strikingthe spring 3 and forcing it down out of the notch in the under side ofthe bar, when said lever is swung down to cut the sprue-hole. The hooksu and y are raised and lowered so as to engage with or disengage fromthe notches on draw-bar S and lever W, as rc-' bearing, rod X angularplate Xfifulcrumed to the under side of the inner end of handlever K,rod X angular plate X, fulcrumed to the side of the hand-lever near itshandle K, and operating-levers Y Y, which are on erated, in conjunctionwith hand-lever K, by forcing them toward or from the handle K, as thecase may be-as, for instance, if it is required to raise hook it out ofthe way and dc,- press book a. the lever Y would be forced toward thehandle K, as shown in the drawings, and vice versa for lowering hook to.

The part marked Z represents simplya brace to strengthen frame-piece M,which supports one end of shaft Gr.

Supposing the compressing-plate Q to be in an elevated position, thelower half-flask or nowel as having been reversed in the operation offorming a mold, as before described, the parting sand sprinkled over thesame, and the upper half-flask or cope unfastened and the two halvesswung out apart, as shown by dotted lines in Fig. 1. The operation ofcompleting the mold by the use of my machine may be briefly summed upthusz' Said cope P is first swung into position and fastened and filledwith sand, when the hand-lever K is then depressed, thereby causingthecompressing-plate to be lowered and the sand thereby compressed, and atthe same time the sprue-hole-punching device is operated, as beforedescribed, and the spruehole punched in the sand, which at the same timelocks the compressing-plate to the cope by the sprue-hole-punching leverstriking the spring 1 when it descends, and thus releasing thelocking-levers, so that they will spring forward'into the slots in theears or flanges g g of the cope P. The plate Q and cope containing thecompressed sand are then raised together into a nearly vertical positionby the continued rotation of disk 'J. The

, poweris then automatically unshipped and the pattern removed or drawnout, as before described. The hand -lever is now depressed a third timeand the lever Y (see Fig. 3) also forced toward handle K, whichoperation lowers the compressing-plate and cope, and at the same timereleases said cope from the plate by the lever S being drawn back byhook u, as before described, and by the continued rotation of disk J thecom 'iressing-plate is again raised into its original elevated position.The cope is now unfastened and swung back into the position shown bydotted lines in Fig. 1, and the nowel removed preparatory to forming thenext mold.

Having described my improvements in power molding-machines, what I claimtherein as new and of my invention, and desireto secure by LettersPatent, is 1. The combination of the lower half-flask or nowel, N, andthe upper half-flask or cope, P, of a. power molding-machinewithcompress ing-plate Q, hinged holding-arms Q Q, link sections R R, RR and R, cross-frame piece It, and the revolving disk J, substantiallyas and for the purpose set forth.

2. The combination of disk J, link-sections R, R R R R compressing-plateQ, cope P, nowel N, hinged arms Q Q, horizontal shaft R, andside frames,E E, substantially as shown and described, for the purpose stated.

3. The combination of the cope P, having bearings P P, hinged cornerso0, and fastened at one side by means of a fastening device, 11, withhorizontal shaft R, substantially as and for the purpose set forth.

4. The combination, with the cope P and compressing-plate Q, having asprue-hole, 702, near the center. of the same, of hollow sprue V, itsholding-lever U, shaft R, spring 00,

notched pull bar or lever W, hook y, swinging lever T, provided withpointed head T hearing T, cross-piece L, side frames, E E, pin '0, anddisk J, substantially as and for the purpose set forth.

5. The combination, with the cope P, having slotted ears or flanges g oflocking-levers S S, compressing-plate Q, plate-holding arms Q, Q,springs r 4", notched pull bar or lever S guides t t,spring 1 andsprue-holding lever U, substantially as and for the purpose set forth.

6. The combination, with notched pull bar or lever S of hook at,swinging lever T, provided with a pointed head, T bearing T, crosspieceL, pin 11, and revolving disk J, substantially as and for the purposeset forth.

7. The combination, with books a and y, of

rods X X, turning angular plate X swinging lever T, rod X turningangular plate X hand-lever K, rod X turning angular plate X andoperating-handles Y and Y, arranged on opposite sides of the handle K,of lever K, substantially as and for the purposes set forth.

8. The combination, with the hub F, of driving-pulley F, shaft G, andspline f, of clutch I, having a circular groove, 1, angular forked leverK cross-piece L, supporting part is, link or connecting rod K hand-leverK, (provided with handle K,) and bearing g, substantially as and for thepurpose set forth.

9. The combination, with angular forked lever K of tilting part m,pointed at the end m and made heavier at the other end, m tilting pin n,disk J, pivot-pin m bearings m m", angular supporting part m slotted aton, shaft G, and part k, substantially as and for the purpose set forth.

10. The combination of the cope P and nowel N, hinged arms QQ,link-sections R R R R R, disk J, shat't G, bearings H H, theirsupports, and driving-pulley F, provided with notched hub F, clutch I,and its shipping-lever K substantially as shown and described, for thepurpose stated.

FRANK s. HAWKINS.

W'itnesses ALBERT A. BARKER, WALTER B. NoURsE.

